* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  color: #1a1a1a;
  background: #f5f5f5;
  margin: 0;
}

header {
  background: #1d3557;
  color: #fff;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

header nav a, header nav button.link {
  color: #fff;
  margin-left: 1rem;
  text-decoration: underline;
}

button.link {
  background: none;
  border: none;
  font: inherit;
  cursor: pointer;
  padding: 0;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
}

button, input[type="submit"] {
  min-height: 44px;
  min-width: 44px;
  font-size: 1rem;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  border: 1px solid #1d3557;
  background: #1d3557;
  color: #fff;
  cursor: pointer;
}

input[type="text"], input[type="password"], input[type="url"] {
  min-height: 44px;
  font-size: 1rem;
  padding: 0.5rem;
  width: 100%;
  max-width: 400px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

th, td {
  text-align: left;
  padding: 0.6rem;
  border-bottom: 1px solid #ddd;
}

.aviso {
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  border-radius: 6px;
  background: #e0e0e0;
}

.aviso-warning { background: #fff3cd; border: 1px solid #ffc107; }
.aviso-info { background: #cfe8ff; border: 1px solid #339af0; }
.aviso-error { background: #ffd6d6; border: 1px solid #e03131; }
.aviso-success { background: #d3f9d8; border: 1px solid #2f9e44; }

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: bold;
  color: #fff;
}

.badge-alta { background: #e03131; }
.badge-media { background: #f0ad4e; color: #1a1a1a; }
.badge-baja { background: #868e96; }
.badge-cambio { background: #339af0; margin-left: 0.4rem; }

.resumen {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 1rem;
}